We report a study of the 2.8 eV blue luminescence (BL) in heaviliy Mg-doped p-GaN via resonant excitation with a tunable blue dye laser. The dependence of the BL on the excitation photon energy (Eex) is unlike that of the yellow luminescence found in n-type GaN. An Urbach-type band tail, with Urbach parameter of 33 meV is observed in the vicinity of the BL energy. We propose that the peak energy of the BL marks the transition from localized states to delocalized states within this band tail.
Original Publication Citation
What determines the emission peak energy of the blue luminescence in highly Mg-doped p-GaAs? J.S. Colton and P.Y. Yu, Appl. Phys. Lett. 78, 25 (21). The original version may be found at: http://apl.aip.org/resource/1/applab/v78/i17/p25_s1
BYU ScholarsArchive Citation
Colton, John S. and Yu, P. Y., "What determines the emission peak energy of the blue luminescence in highly Mg-doped p-GaN?" (2001). All Faculty Publications. 575.
American Institute of Physics
Physical and Mathematical Sciences
Physics and Astronomy
© 2001 American Institute of Physics
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